Girard Avenue Bridge, Fairmount Park, 1895
Queen Lane Pumping Station, proposed design
Mill Creek Sewer under construction, 1883
Dobson’s Mill, 1884, from History of Philadelphia by Scharf & Wescott
Perkiomen Water Supply Surveys, 1866
Schuylkill River Hydrographical Survey 1861-66 by H. P. M. Birkinbine
Outhouse over the Schuylkill near Pottstown
“Philadelphie,” Bird’s Eye View, 1855
Fairmount Water Works, about 1860
Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia, 1912